syzkaller login: [ 38.695817] BUG: Bad rss-counter state mm:000000006f3d5c1c type:MM_FILEPAGES val:33 [ 38.697077] BUG: Bad rss-counter state mm:000000006f3d5c1c type:MM_ANONPAGES val:22 [ 38.837566] ================================================================== [ 38.838668] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.839827] Read of size 8 at addr ffff88800caa53f8 by task sshd/219 [ 38.840943] [ 38.841159] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.842004] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.842979] Call Trace: [ 38.843293] [ 38.843575] dump_stack_lvl+0x91/0xf0 [ 38.844058] print_report+0xcc/0x620 [ 38.844553] ? __virt_addr_valid+0x102/0x340 [ 38.845106] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.845715] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.846334] kasan_report+0xbe/0xf0 [ 38.846816] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.847427] vma_interval_tree_remove+0xc75/0xec0 [ 38.848025] vma_prepare+0xc54/0x11a0 [ 38.848497] __split_vma+0x5af/0x950 [ 38.848979] ? __pfx___split_vma+0x10/0x10 [ 38.849506] ? find_held_lock+0x2c/0x110 [ 38.850033] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.850598] ? lock_is_held_type+0x9f/0x120 [ 38.851137] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.851745] ? mtree_range_walk+0x632/0x900 [ 38.852299] ? mas_walk+0x5c7/0x7c0 [ 38.852796] do_vmi_munmap+0x1f1/0x2b0 [ 38.853290] mmap_region+0x1f9/0x2660 [ 38.853774] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.854285] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.854998] ? __pfx_lock_acquire+0x10/0x10 [ 38.855529] ? __pfx_mmap_region+0x10/0x10 [ 38.856058] ? security_mmap_addr+0x7d/0xa0 [ 38.856597] ? get_unmapped_area+0x1f5/0x3f0 [ 38.857145] do_mmap+0x854/0xf00 [ 38.857584] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.858079] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.858644] ksys_mmap_pgoff+0x3af/0x500 [ 38.859148] do_syscall_64+0x3f/0x90 [ 38.859627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.860287] RIP: 0033:0x7fdef44b2d82 [ 38.860762] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 38.862873] RSP: 002b:00007ffedd0526c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.863769] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdef44b2d82 [ 38.864638] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdef38ec000 [ 38.865474] RBP: 00007fdef38ec000 R08: 0000000000000009 R09: 0000000000001000 [ 38.866324] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad72f33ec0 [ 38.867173] R13: 00007ffedd0526e0 R14: 00007ffedd052710 R15: 00007ffedd052a70 [ 38.868032] [ 38.868331] [ 38.868551] Allocated by task 212: [ 38.868986] kasan_save_stack+0x22/0x50 [ 38.869491] kasan_set_track+0x25/0x30 [ 38.869982] __kasan_slab_alloc+0x59/0x70 [ 38.870512] kmem_cache_alloc+0x16b/0x370 [ 38.871028] vm_area_dup+0x20/0x160 [ 38.871480] __split_vma+0x170/0x950 [ 38.871946] split_vma+0xc6/0x110 [ 38.872384] mprotect_fixup+0x8d2/0xb30 [ 38.872906] do_mprotect_pkey+0x87e/0xd40 [ 38.873430] __x64_sys_mprotect+0x78/0xc0 [ 38.873958] do_syscall_64+0x3f/0x90 [ 38.874431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.875074] [ 38.875286] Freed by task 212: [ 38.875680] kasan_save_stack+0x22/0x50 [ 38.876193] kasan_set_track+0x25/0x30 [ 38.876724] kasan_save_free_info+0x2b/0x50 [ 38.877288] __kasan_slab_free+0x10a/0x190 [ 38.877852] kmem_cache_free+0x10d/0x4d0 [ 38.878386] rcu_core+0x8c8/0x2860 [ 38.878857] __do_softirq+0x1b7/0x7d4 [ 38.879352] [ 38.879573] Last potentially related work creation: [ 38.880180] kasan_save_stack+0x22/0x50 [ 38.880711] __kasan_record_aux_stack+0x8e/0xa0 [ 38.881345] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.882020] remove_vma+0x139/0x170 [ 38.882493] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.883061] do_vmi_munmap+0x1f1/0x2b0 [ 38.883574] __vm_munmap+0x138/0x3a0 [ 38.884071] __x64_sys_munmap+0x59/0x80 [ 38.884613] do_syscall_64+0x3f/0x90 [ 38.885109] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.885777] [ 38.886004] The buggy address belongs to the object at ffff88800caa53a0 [ 38.886004] which belongs to the cache vm_area_struct of size 168 [ 38.887535] The buggy address is located 88 bytes inside of [ 38.887535] freed 168-byte region [ffff88800caa53a0, ffff88800caa5448) [ 38.889021] [ 38.889246] The buggy address belongs to the physical page: [ 38.889941] page:000000008057d1a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcaa5 [ 38.891085] memcg:ffff88800e7a1f01 [ 38.891519] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.892194] page_type: 0xffffffff() [ 38.892693] raw: 0100000000000200 ffff8880087a0c80 ffffea000031e740 dead000000000006 [ 38.893656] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7a1f01 [ 38.894602] page dumped because: kasan: bad access detected [ 38.895295] [ 38.895522] Memory state around the buggy address: [ 38.896130] ffff88800caa5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.897034] ffff88800caa5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.897929] >ffff88800caa5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.898833] ^ [ 38.899721] ffff88800caa5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.900633] ffff88800caa5480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.901529] ================================================================== [ 38.902509] Disabling lock debugging due to kernel taint [ 40.820353] BUG: Bad rss-counter state mm:00000000e9a760f6 type:MM_FILEPAGES val:33 [ 40.821679] BUG: Bad rss-counter state mm:00000000e9a760f6 type:MM_ANONPAGES val:22 [ 41.363079] BUG: Bad rss-counter state mm:000000008f34e460 type:MM_FILEPAGES val:33 [ 41.364500] BUG: Bad rss-counter state mm:000000008f34e460 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61738' (ECDSA) to the list of known hosts. 2023/06/20 13:36:48 fuzzer started 2023/06/20 13:36:48 dialing manager at localhost:36067 2023/06/20 13:36:48 checking machine... 2023/06/20 13:36:48 checking revisions... [ 41.964415] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:36:48 testing simple program... [ 42.009564] cgroup: Unknown subsys name 'net' [ 42.044492] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:36:48 Registers: info registers vcpu 0 RAX=ffff8880181a0000 RBX=ffff88800cbec8b8 RCX=1ffff11001ba5e14 RDX=dffffc0000000000 RSI=ffff888018193200 RDI=ffff88800cbec8e8 RBP=ffff88800d885d88 RSP=ffff888015937cb8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888018192200 R13=0000000000000000 R14=ffff88800ea82508 R15=ffff88800ea824c0 RIP=ffffffff81847688 RFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa0fc263900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fa0fb66c070 CR3=000000000d66c000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=863459447c7478b300000000000ae988 XMM05=fb382914982e60b70000000000132848 XMM06=806171799158d9670000000000130cc0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff860d2fe1 RBX=0000000000000001 RCX=ffffffff860d2fdc RDX=0000000000000000 RSI=1ffffffff0c1a5fc RDI=ffffffff85dba0f4 RBP=ffff888008e379d0 RSP=ffff888008e37908 R8 =ffffffff860d2fd0 R9 =ffff888008e379b8 R10=0000000000038001 R11=000000000000fdcc R12=ffff888008e379d8 R13=ffff888008e379c0 R14=ffff888008e379b9 R15=ffff888008e37978 RIP=ffffffff81130a5b RFL=00000216 [----AP-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f3bc38a80b0 CR3=0000000015b6c000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2037343a36333a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a36333a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000